What is the maximum amount of search results? Where is it configurable?
At the maximum, for each facet (ex: using @userid which searches for userid in contacts table only) you can only display a maximum of 20 records. This is a hard limit at this time. If you are doing multi faceted search (example: just typing a string in the Global Search bar) then a maximum of 5 records per facet can be displayed. This can not be configured.